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    Apparatus and method for recording and reproducing hologram, and spatial light modulator therefor
    4.
    发明授权
    Apparatus and method for recording and reproducing hologram, and spatial light modulator therefor 失效
    用于记录和再现全息图的装置和方法及其空间光调制器

    公开(公告)号：US07593304B2

    公开(公告)日：2009-09-22

    申请号：US11209800

    申请日：2005-08-24

    申请人： Kazuki Matsumoto ,  Akiko Hirao ,  Rumiko Hayase ,  Takayuki Tsukamoto

    发明人： Kazuki Matsumoto ,  Akiko Hirao ,  Rumiko Hayase ,  Takayuki Tsukamoto

    IPC分类号： G11B7/00

    CPC分类号： G11B7/128 ,  G11B7/0065 ,  G11B7/083

    摘要： A hologram recording/reproducing apparatus includes a recording/reproducing optical system that guides at least one of an information beam and a reference beam to an optical recording medium; a spatial light modulator that is arranged in an optical path of the recording/reproducing optical system, and spatially modulates a beam guided via the recording/reproducing optical system to generate the information beam; a first misalignment detecting unit that detects a first misalignment between the recording/reproducing optical system and the spatial light modulator using a beam for detecting the first misalignment; and a first misalignment correcting unit that corrects the first misalignment based on the first misalignment detected by the first misalignment detecting unit.

    摘要翻译： 一种全息记录/重放装置，包括将信息光束和参考光束中的至少一个引导至光学记录介质的记录/再现光学系统; 布置在记录/再现光学系统的光路中的空间光调制器，并且空间调制经由记录/再现光学系统引导的光束以产生信息光束; 第一未对准检测单元，使用用于检测第一未对准的光束来检测记录/再现光学系统和空间光调制器之间的第一未对准; 以及第一未对准校正单元，其基于由第一未对准检测单元检测到的第一未对准来校正第一未对准。

    Reproducing apparatus, recording and reproducing apparatus and reproducing method
    6.
    发明申请
    Reproducing apparatus, recording and reproducing apparatus and reproducing method 审中-公开
    再现装置，记录和再现装置和再现方法

    公开(公告)号：US20050195722A1

    公开(公告)日：2005-09-08

    申请号：US11065075

    申请日：2005-02-25

    申请人： Takayuki Tsukamoto ,  Kazuki Matsumoto ,  Rumiko Hayase ,  Akiko Hirao ,  Katsutaro Ichihara ,  Urara Ichihara

    发明人： Takayuki Tsukamoto ,  Kazuki Matsumoto ,  Rumiko Hayase ,  Akiko Hirao ,  Katsutaro Ichihara ,  Urara Ichihara

    IPC分类号： G03H1/26 ,  G11B7/00 ,  G11B7/0065 ,  G11B7/135

    CPC分类号： G11B7/0065 ,  G03H1/22 ,  G03H1/2286 ,  G03H2001/2228 ,  G03H2222/56 ,  G03H2250/42 ,  G11B7/00781 ,  G11B7/24044

    摘要： Provided is a technique for reproducing information recorded on a holographic recording medium including a reflecting layer and a recording layer. When reproducing, a reproducing reference light is focused on a reflecting surface of the reflecting layer to produce a phase conjugate reproduced light and an ordinary reproduced light, and the phase conjugate reproduced light and the ordinary reproduced light are guided to a sensing surface of an image sensor to produce on the sensing surface a first reproduced image and a second reproduced image smaller than the first reproduced image, respectively. An intensity of the ordinary reproduced light on the sensing surface is higher than an intensity of the phase conjugate reproduced light on the sensing surface. An output of the image sensor corresponding to a non-overlapping portion of the first reproduced image which does not overlap the second reproduced image is utilized for reproducing the information.

    摘要翻译： 提供了一种用于再现记录在包括反射层和记录层的全息记录介质上的信息的技术。 当再现时，再现参考光聚焦在反射层的反射表面上以产生相位共轭再现光和普通再现光，并且相位共轭再现光和普通再现光被引导到图像的感测表面 传感器，以在感测表面上分别产生第一再现图像和小于第一再现图像的第二再现图像。 感测表面上的普通再现光的强度高于感测表面上的相位共轭重现光的强度。 利用与不与第二再现图像重叠的第一再现图像的非重叠部分对应的图像传感器的输出来再现信息。

    Optical information recording apparatus and method for recording optical information
    8.
    发明申请
    Optical information recording apparatus and method for recording optical information 审中-公开
    用于记录光学信息的光学信息记录装置和方法

    公开(公告)号：US20060077857A1

    公开(公告)日：2006-04-13

    申请号：US11227271

    申请日：2005-09-16

    申请人： Akiko Hirao ,  Kazuki Matsumoto ,  Rumiko Hayase ,  Takayuki Tsukamoto

    发明人： Akiko Hirao ,  Kazuki Matsumoto ,  Rumiko Hayase ,  Takayuki Tsukamoto

    IPC分类号： G11B7/135

    CPC分类号： G11B7/128 ,  G11B7/0065

    摘要： The optical information recording apparatus includes a laser light source for radiating a light beam, a spatial light modulator disposed on an optical path of the light beam, a power density control mechanism disposed on the optical path, an interference fringe formation mechanism. The spatial light modulator has pixels arranged in a two-dimensional array at which a central section of the light beam is radiated. The spatial light modulator spatially modulates the light beam. The power density control mechanism is set such that the transmittance with respect to the light beam at a portion where the central section is radiated is lower than that at which a peripheral section of the light beam is radiated. The interference fringe formation mechanism forms interference fringes from the central section and the peripheral section on the optical information recording medium disposed downstream on the optical path.

    摘要翻译： 光信息记录装置包括用于照射光束的激光源，设置在光束的光路上的空间光调制器，设置在光路上的功率密度控制机构，干涉条纹形成机构。 空间光调制器具有排列成二维阵列的像素，在该阵列处照射光束的中心部分。 空间光调制器对光束进行空间调制。 功率密度控制机构被设定为使得在中心部分被辐射的部分处的相对于光束的透射率低于照射光束的周边部分的透射率。 干涉条纹形成机构从位于光路上的光信息记录媒体上的中央部和周边部分形成干涉条纹。